CVE-2001-0183 json
ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag in a TCP packet, wh…
published 2001-03-26 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0183
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.1%
- EPSS 8.1% chance of exploitation in 30 days, percentile 94%
- public exploits
- 1
- Exploit-DB
Summary
ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag in a TCP packet, which makes the packet appear to be part of an established connection.
Patch / fix
- securityfocus.com/bid/2293 advisory
Timeline
- First public exploit (EDB-20593)
- Published
Exploit prediction
8.09% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-20593 FreeBSD 3.x/4.x - 'ipfw' Filtering Evasion remote, 2001-01-23
- securityfocus.com http://www.securityfocus.com/bid/2293 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
-
securityfocus.com
/bid/2293
vdb-entry, exploit, patch, vendor-advisory
-
ciac.org
/ciac/bulletins/l-029.shtml
third-party-advisory, government-resource
-
security-express.com
/archives/bugtraq/2001-01/0424.html
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/5998
vdb-entry
-
osvdb.org
/1743
vdb-entry
Sources
- CVE List CVE-2001-0183
- NVD CVE-2001-0183
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